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Spraying-type fire preventing and extinguishing material for coal mine and preparation method thereof

A fire prevention and coal mine technology, applied in mining equipment, fire prevention, dust prevention, etc., can solve the problems of not reaching the flame retardant level of alcohol lamps, etc., and achieve the effect of superior flame retardant performance, good compatibility, and simple process

Active Publication Date: 2013-11-13
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The flame retardant material composed of polyvinyl alcohol and ammonium polyphosphate can be used in coal mines for coal plugging air treatment to achieve flame retardant and air plugging effects. The material can self-extinguish after being ignited, but it has not yet Reach the flame retardant level that cannot be ignited with an alcohol lamp

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1) In a water bath, add 5g of polyvinyl alcohol into 20g of water solvent and fully stir to dissolve, control the temperature at 70-100°C, and stir for 2-5h;

[0020] 2) Mix and add 4g of phosphoric acid and 4g of urea into 5g of water to dissolve, then slowly drop into the solution obtained in step 1), react at a water bath temperature of 80-100°C, and the reaction time is 2-5h;

[0021] 3) Add 33g of water to continue the reaction for 2h, then add 4g of triphenyl phosphite and stir for 1h, the temperature is controlled at 80-100°C;

[0022] 4) When the solution is cooled to 40-60°C, add 5g of white latex and stir well until it is evenly stirred.

[0023] 5) Add 20 g of inorganic aggregate into the obtained solution at room temperature and stir well until uniform.

[0024] The resulting spray-type fire-fighting material for coal mines has a flat surface after forming a film in a mold, and the film has good compactness, and the material is not ignited by heating with a...

Embodiment 2

[0026] 1) In a water bath, add 5g of polyvinyl alcohol into 20g of water solvent and fully stir to dissolve, control the temperature at 70-100°C, and stir for 2-5h;

[0027] 2) Mix and add 4g of phosphoric acid and 4g of urea into 5g of water to dissolve, then slowly drop into the solution obtained in step 1), react at a water bath temperature of 80-100°C, and the reaction time is 2-5h;

[0028] 3) Add 30g of water to continue the reaction for 2h, then add 7g of triphenyl phosphite and stir for 1h, the temperature is controlled at 80-100°C;

[0029] 4) When the solution is cooled to 40-60°C, add 5g of white latex and stir well until it is evenly stirred.

[0030] 5) Add 20 g of inorganic aggregate into the obtained solution at room temperature and stir well until uniform.

[0031] The resulting spray-type fire-fighting material for coal mines has a flat surface after forming a film in a mold, and the film has good compactness, and the material is not ignited by heating with a...

Embodiment 3

[0033] 1) In a water bath, add 5g of polyvinyl alcohol into 20g of water solvent and fully stir to dissolve, control the temperature at 70-100°C, and stir for 2-5h;

[0034] 2) Mix and add 4g of phosphoric acid and 4g of urea into 5g of water to dissolve, then slowly drop into the solution obtained in step 1), react at a water bath temperature of 80-100°C, and the reaction time is 2-5h;

[0035] 3) Add 27g of water to continue the reaction for 2h, then add 10g of triphenyl phosphite and stir for 1h, the temperature is controlled at 80-100°C;

[0036] 4) When the solution is cooled to 40-60°C, add 5g of white latex and stir well until it is evenly stirred.

[0037] 5) Add 20 g of inorganic aggregate into the obtained solution at room temperature and stir well until uniform.

[0038] The resulting spray-type fire-fighting material for coal mines has a flat surface after forming a film in a mold, and the film has good compactness, and the material is not ignited by heating with ...

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Abstract

The invention relates to a spraying-type fire preventing and extinguishing material for a coal mine and a preparation method thereof, and belongs to the field of fire preventing and extinguishing materials for the coal mine. The preparation method comprises the steps that 2-6 percent of polyvinyl alcohol, 1-5 percent of phosphoric acid and 1-5 percent of urea react are polymerized in water solvent, then 4-10 percent of triphenyl phosphite and 4-10 percent of white latex are added to continue reaction, and finally 15-25 percent of inorganic aggregate is added and is fully agitated to obtain the product. The inorganic aggregate is one or any combination of talcum powder, kaolin and mica powder. The process is simple when the material provided by the invention is used and the material is directly sprayed onto surfaces of coal blocks through a spraying machine to block passages which leak air; the triphenyl phosphite is highly compatible with the system and the stability of the obtained product is good; and the material has an excellent flame retarding performance and can reach a flame-retardant level that the material cannot be ignited by using an alcohol burner.

Description

technical field [0001] The invention belongs to the field of fire-preventing materials for coal mines, and in particular relates to a spray-coated fire-preventing material for preventing spontaneous combustion of coal in coal mines and a preparation method thereof. technical background [0002] my country's coal occupies a dominant position in China's energy structure, which has great strategic significance for our country and has brought huge benefits to the country and the people. However, the conditions in my country's coal mine field are complex and the environment is harsh, and various accidents will cause huge losses to the country every year. Economic and property losses, these accidents have brought great physical and mental harm to people. After the coal seam is mined, the air volume exchange between the ground and the air inlet roadway, between the air inlet roadway and the return air roadway, and between the air return roadway and the ground gradually increases, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F5/06
Inventor 索红莉陈立佳马麟王鼎元田辉张腾郭艾东朱红青
Owner BEIJING UNIV OF TECH
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